Oh how I wish I already had the chalkboard wall already done in my new studio/office that I plan to paint soon, but alas this suggestion came too early for the wall. So next best thing is using a white charcoal pencil on a black tile because I don't seem to have any chalk. I also don't really have good sidewalks to tangle on if I had chalk anyway. I live in a historic neighborhood with brick sidewalks so that wasn't an option. If you haven't used a white charcoal pencil it really kind of feels like chalk as it moves across the paper. I decided to go with a monotangle of arukas. I had planned to completely fill in the tile but decided to stop just short of filling it because I thought it looked cool.